Improvement in lamp-burners



UNITED STATES PATENT OFFICE.

A. C. KETGHUM, OFNEW YORK, N. Y'.

IMPROVEMENT IN` L'AMP-BURNr-in's.

Specification forming part of Letters'Patent No. 36,717, dated October 2l, 1862.

lTo all whom it may concern: A

Be it known that I, A. C. KETCHUM, of theta good non-,conductor of heat. This case or t' city, county, and State of New York, have invented a new and Improved Lamp-Burner;

and Ido hereby declare that the following is a full, clear, and exact description of the same,

. reference being had to the accompanying drawings, making a part of this specilication, in whichl i Figure 1 is an external view of rnyinvention. Fig. 2 is a vertical central section of the same, taken in the line .fr x, Fig. 1.

Similar letters of reference indicate corresponding parts in the two figures.

The object of this invention is to obtain a lamp-burner which will not conduct the heat from the fiame down to the body of the lamp in such a degree as to volatilize the oil too rapidly, and which at the same time will cause the flame tobe supplied with air in a comparatively cool state, and in suicient volume to insure perfect combustion, theI supply of air y to the dame being commensurate with the supply ofV vapor.

The invention is designed'for burning coaloil and other hydrocarbons, which volatilize at a comparatively low temperature and require an excess of oxygen to support proper 'combustion for illuminating purposes,

The invention consistsin surroundinga metal wick-tube with a case or jacket constructed of porcelain, pottery, earthenware, glass, or any baked or unbaked /clay or earthy substance which is a good non-conductor of heat, and using in connection therewith a cone or del Hector constructed of metal, enameled both externally and internally and applied to the 'case or jacket, substantially as hereinafter shown and described, whereby the desired end l is attained.

fr@ enable those' sinned in the uit to fuuy understand and construct my'invention, I will proceed to describe it.

A lrepresents a metal cap, which is screwed into the top of t-he lamp, and B is a metal wick-tube, which is secured vertic illy and centrally'in the cap A, projecting a rifle below it," but extending a considerabl distance aboveit, asshown clearly in Fig.'2. The wicktube may be of the dat kind ordinarily used in coal-oil burners, audit is surrounded by a euse or jacket, C, constructed of porcelain,

I pottery, ,earthenwara glass, or other baked or unbaked clay or analogous substance which is jacket C extends up nearly :1s-high as thewicktube B,;and it is of such diameter internally that the narrow sides of the wien-mbe E win be in contact with its upper part, leaving a,

space, ac, at each side for the draft or passage of air to the haine. (See Fig. 2.) The lower part of the vcone or jacket is expanded in bell form, as shown clearly in Fig. 2.

D is a cone or dedector, which is constructed `itsnpper end. To the lower edge of the cone `or deiiector there are attached aseriesof metal. strips or rods, d, which bear or press against y theouter side of the case or jacket C, and re-V tain the casein proper position on Gand Without allowingit to be in contact therewith. lIn case a more perfect insulation of the cone or deectorfroni the case or jacket C should be required, the former may have rods e attached to it, which extendv down and either rest on or clasp the top of the .lamp or a plate, Eat-` tached thereto, as shown in Fig. L j

From the above' description itwill beseen that when the wick in the tube B is lighted the latter is the only part of the burner .that will conduct the heat from the flame downwardto the lamp. This, however, is suflicient to volatilizel the oil` and cause the flame to be sup vplied with a `requisite amount of vapor. The Y ame is supplied with air passing up through the case or jacket C and under the lower edge or base of the cone or dellector D, (see arrows, Fig. 2,) and as vfr tlliml are both good non- 4conductors of heat, `t-he Vilav'fieiivill`besupplied with air not too much rarefied, and conse quently with a large volume of oxygen, and

perfect combustion is obtained, as the supplyl of air or oxygen to the'ame is commensurate claimas new, and desire to secure by Letters 1. A lamp-burner having a metal wicktubc,

B, surrounded by a case or jacket, C, of porcena1ly, and` applied to the case or jacket C, or 1 lain, pottery, enrthenware, glass, or :my baked t0 the'lalmp, substantially as and for the pure.

or unbaked eay or earthy substance which is poses herein shown and described a good non-conductor of heat, Substantially as ARCHIBALD C. KETGHUM.

and for bhe purpose herein set forth. Ttnesses:

2. A cone or defecfor, D, constructed of JAMES LAIRD,

metal and enameled bobhexternally and interl EDWV. HODGSON. 

